JP2837312B2 - Method and apparatus for rolling stainless steel sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rolling method and apparatus used therefor was as good stainless rolled steel sheet gloss is obtained in the rolling mill used for rolling ordinary steel stainless thin steel plate.

[0002]

2. Description of the Related Art Conventionally, a strip of cold-rolled stainless steel sheet or the like, for which surface quality and surface gloss are regarded as important, is manufactured by reverse rolling using a Sendzimir mill equipped with a small-diameter multi-stage roll and repeating a number of passes. Have been. However, the reverse rolling method using a Sendzimir mill has a problem that the work roll has a small diameter, so the biting ability at the tip of the strip is low and the threading work is unstable, and the repetition of reciprocating passes reduces productivity and costs. there were. To solve these problems, Nisshin Steel Technical Report 25
No. (November 1971), Sendzimir tandem mills as described in p1 to p9 were developed. this is,
While arranging multiple Sendzimir mills in tandem,
By arranging a welding machine on the entry side of the rolling mill to enable endless rolling, the problems of biting of small-diameter rolls and the problem of low productivity have been addressed, and the effect of improving productivity to a certain extent has been achieved. However, the roll overheating and the frequency of roll replacement caused by the roll diameter being as small as about 50 to 120 mm were restricted, so that productivity improvement beyond a certain level could not be expected.

However, there is a strong demand for further improvement in productivity, and in response, for example, Japanese Patent Publication No. 3-479.
28, a rolling method using a tandem mill in which a plurality of large-diameter roll mills for ordinary steel are arranged as shown in JP-A-4-52005-52009 and the like. Here, the superiority of the rolling by the large-diameter roll will be described as follows. (1) Since the heat radiation area of the surface of the roll is increased, the roll is efficiently cooled, and the roll and the plate are hardly seized due to overheating of the roll. As a result, higher-speed rolling becomes possible and productivity can be improved. (2) Since the circumference of the roll increases in proportion to the roll diameter, the life of the roll is improved, and the frequency of replacing the roll is reduced. As a result, downtime for roll replacement is reduced, and productivity can be improved. (3) When the rolling mill is of a batch type, the larger the roll diameter is, the more excellent the biting ability of the leading end of the strip is, and the more stable the threading operation can be performed. (4) As stated in Tokuhei 3-47928,
The large-diameter roll is less likely to cover irregularities on the material surface during cold rolling, and a product with a better surface can be obtained.

[0004]

As described above, the rolling method using a tandem mill for ordinary steel uses a large-diameter work roll having a diameter of about 250 to 650 mm. And the roll life is five or six times longer than the conventional one, and the biting performance is good. As a result, it is possible to secure a high rolling speed.

However, it is difficult to produce cold rolled stainless steel sheets or the like that require high-quality surfaces because the strips of coils that are wound at high speed rub against each other to cause scratches on the surface, so that good gloss cannot be obtained. There was a problem. The present invention has been made in view of such a conventional problem, and using a tandem mill for ordinary steel, without causing scratches on the wound coil, a cold rolled roll requiring a beautiful surface. It is an object of the present invention to provide a rolling method and a device that enable high-speed rolling of a metal strip such as a stainless steel plate.

[0006]

Means for Solving the Problems One aspect of the present invention is to provide a solid-state imaging device .
When rolling a stainless steel sheet, a tandem rolling mill in which a plurality of rolling mills of six or less stages are arranged in a 1000 m / mi range is used.
A method for rolling a stainless steel sheet, comprising: performing cold rolling at a speed of n or more, and then winding while inserting a slip sheet between layers of a strip. Further, other inventions of the present application are:
A rolling speed of 1000 in which a plurality of rolling mills of 6 stages or less are arranged.
This is a stainless steel sheet rolling apparatus in which a slip sheet inserting device is provided on the output side of a tandem rolling mill capable of cold rolling at a speed of m / min or more .

Hereinafter, the present invention will be described in more detail. The present inventors have conducted intensive studies with a view to rolling a metal strip such as a cold-rolled stainless steel plate requiring a beautiful surface at a high speed. As a result, it has been found that this intention can be realized if the interleaf can be wound while inserting a slip sheet between the strip layers that are rolled at a high speed using a tandem rolling mill of ordinary steel. Thereby, it is possible to prevent scratches from being formed on the strip surface. For example, it is possible to produce a rolled stainless steel sheet having a surface quality as good as Sendzimir Mill with a gloss of N0.2B on a line similar to the rolling line for ordinary steel sheets. . Thus, the conventional 600
Although the rolling speed is about m / min, it is 1000 m / min.
min and higher rolling speeds are possible, and there is virtually no need to change rolls .
The inventors have found that a stainless steel sheet can be manufactured, and have completed the present invention.

According to the present invention, a rolling speed of 1000 m provided with a large-diameter work roll having a roll arrangement of 6 stages or less.
/ Min or more tandem rolling mill for ordinary steel is used. This is because a multi-high rolling mill having more than six stages has a work roll diameter that is too small, so that the superiority of the above-described rolling with a large-diameter roll cannot be obtained, and improvement in productivity cannot be achieved. In the present invention, a slip-sheet inserting device is further provided in the winding device on the output side of the tandem rolling mill for ordinary steel. If the slip-sheet inserting device is not provided in the winding device, the strips of the wound coil directly rub against each other, so that the strip surface is scratched and the gloss deteriorates.

Next, the present invention will be described more specifically with reference to examples.

[0010]

FIG. 1 is a view schematically showing one embodiment of a rolling apparatus according to the present invention. In this embodiment, the rolling apparatus is a batch type and has a rolling speed of 1000 m / min or more.
Using a tandem rolling mill for cold rollable ordinary steel,
A cold-rolled stainless steel sheet was manufactured. Above the outlet side of the strip winding device 12 of the tandem mill 11 for the ordinary steel-sheet insertion device 13 is provided.
The tandem rolling mill 11 is configured by arranging four four-roll rolling mills 111 in series. On the entry side of the tandem rolling mill 11, mechanical equipment such as a coil rewinding device (pay-off reel) 14, a deflector roll 15, On the delivery side, in addition to the winding device 12, a shear 16, a deflector roll 1
7. Machine equipment such as a coil car 18 is provided.

The slip-sheet inserting device 13 includes a slip-sheet rewinding device (unwinder) 20 disposed right above the winding device 12 for strip m made of stainless steel plate. This is a configuration in which the paper p is wound down while being wound around the coil 21 and is supplied immediately below. The rolling method of the stainless steel sheet thus configured by the rolling device is performed as follows.

The strip m discharged from the coil rewinding device 14 is continuously supplied to a tandem rolling mill 11 via a deflector roll 15 and is sequentially rolled by a large-diameter roll 111A of each rolling mill 111 to be rolled to a predetermined plate. After being thickened, the winding device 1 passes through the deflector roll 17 on the delivery side.
Reach 2. On the other hand, the slip sheet p wound around the slip sheet coil 21 is paid out by the slip sheet rewinding device 20 of the slip sheet insertion device 13, and is sent out to the winding device 12 immediately below.

The leading end of the rolled strip m that has reached the winding device 12 is wound around the winding reel 12A of the winding device 12, and at this time, the slip sheet p is wound around the strip m. The operation of the tandem rolling mill 11 and the winding device 12 is performed as it is, and the strip m is continuously wound on the winding reel 12A, and the strip m already wound and the strip m wound on the outside thereof are formed. Between them, the slip sheet p is inserted and wound up at the same time. Since the slip sheet p is interposed between the strip layers of the coil 22 wound in this manner, the wound strips are rubbed against each other to cause scratches on the surface and the gloss of the product is not impaired. Namino N
o. A beautiful surface of 2B could be obtained.

When the coil 22 has a predetermined size, the strip m is cut by the shear 16. At the same time, the slip sheet p is also cut by a cutter knife or the like. Next, using the coil car 18, the coil 22 around which the slip sheet p and the strip m are wound together is extracted from the winding device 12.
Thereafter, the rolling line is again operated at a low speed, and while the leading end of the succeeding strip m is wound around the new take-up reel 12A, the slip sheet p is wrapped over the new take-up reel 12A, and the next winding of the coil 22 is started.

Although the above embodiment has been described with reference to the case where the coil 22 is wound downward, the direction of supply of the slip sheet p from the slip sheet coil 21 by the slip sheet rewinding device 20 is taken into consideration. Can also be applied. FIG. 2 schematically shows another embodiment of the rolling apparatus according to the present invention. In this embodiment, the rolling apparatus is completely continuous and has a rolling speed of 1000 m / min or more.
This is a cold rolled stainless steel sheet production line using a tandem rolling mill for ordinary steel that can be cold rolled at a low temperature . The tandem rolling mill 11 itself is the same as that of the above embodiment, but in order to enable continuous cold rolling, a welding device 30 and an N
o. No. 1 bride roll 31, looper 32, no. The point that the supply of the strip m discharged from the coil rewinding device 14 is not interrupted by the provision of the two bridging rolls 33, and the winding device 12, the slip sheet inserting device 13 and the like are provided on the output side. This is different from the above-described embodiment in that the strip m and the interleaf p are wound up non-stop by alternately switching them.

Other configurations, operations and effects are almost the same as those of the first embodiment, but have the advantage that the productivity can be further improved as compared with the batch type.

[0017]

As described above, according to the present invention,
Rolling speed 1000m with a plurality of rolling mills of 6 stages or less arranged
/ Min, and the coil is wound while inserting a slip sheet between the layers of the strip that has been cold-rolled by a tandem rolling mill for ordinary steel that can be cold-rolled at a speed of at least / min. In addition, the wound coil can be prevented from being scratched, and as a result, the effect of greatly improving the productivity of a metal strip such as a cold-rolled stainless steel plate requiring a beautiful surface can be obtained.

[Brief description of the drawings]

FIG. 1 is a view schematically showing one embodiment of a rolling apparatus according to the present invention.

FIG. 2 is a view schematically showing another embodiment of the rolling apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Tandem rolling machine 111 Rolling machine (of 6 steps or less) 12 Winding device 13 Interleaving paper insertion device 20 Interleaving paper rewinding device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-151306 (JP, A) JP-A-59-118202 (JP, A) JP-A-59-10404 (JP, A) JP-A-3-301 161119 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B21B 3/02 B21B 1/22-1/36 B21C 47/26

Claims (2)

(57) [Claims] Upon 1. A rolling stainless steel sheets, using a tandem rolling mill in which a plurality base sequence of six stages following rolling mill
A method for rolling a stainless steel sheet, comprising: cold rolling at a speed of 1000 m / min or more, and winding while inserting a slip sheet between layers of the strip. 2. A pressure machine in which a plurality of rolling mills of 6 or less stages are arranged.
A tandem rolling mill capable of cold rolling at a speed of at least 1000 m / min .
Rolling equipment for stainless steel sheet.